Why break them loose? It's called break away torque. In my case the nuts are torqued at 110 ft lbs, it will take more than 110 to move them.
As far as the re torque goes there may be some head gaskets still made that require it, Fel Pros don't, PermaTorque. I've been using them for 40 years and have never re torqued one, even in lean times when I reused them and never had a leak. This may be the first, who knows. Bottom line, keep doing what works for you.
I posted this because I found it interesting, specifically the fact that the bolt with it's smaller shaft diameter moved less than the nuts on the studs did. It may be the fact that the nut is fine thread and has to turn more than to move the same distance as the coarse thread, plus the little extra radial tension at the washer. I'm some sharp character out there can explain it. LOL
